'''Public Service Enterprise Group''' ('''PSEG'''), founded as the '''Public Service Corporation of New Jersey''' and later renamed '''Public Service Electric and Gas Company''' ('''PSE&G'''), is a publicly traded diversified energy company headquartered in Newark, New Jersey|Newark
, New Jersey
. The company's largest subsidiary retains the old PSE&G name. New Jersey's oldest and largest investor owned utility
, Public Service Electric and Gas Company is a regulated gas and electric utility company
serving the state of New Jersey.